Understanding the £1 Million Inheritance Tax Threshold
Money expert Martin Lewis has highlighted a key HMRC rule that allows many UK families to pass on up to £1 million without paying Inheritance Tax. This is not a new policy change, but a clarification of how existing allowances can be combined. The rule centres on the effective use of the Nil-Rate Band and the Residence Nil-Rate Band, which are statutory thresholds set by the UK government.
What is the £1 Million Inheritance Tax Rule?
The so-called “£1 million rule” refers to the combined value of two specific tax-free allowances for estates passed on death. It is not a single allowance but the sum of two separate components established in law.
The Standard Nil-Rate Band
The Nil-Rate Band is the amount of an estate that is exempt from Inheritance Tax. For the 2024/25 tax year, this threshold is frozen at £325,000 per person. This allowance can be transferred between married couples or civil partners, meaning a surviving spouse can potentially have a combined Nil-Rate Band of £650,000.
The Residence Nil-Rate Band
Introduced in April 2017, the Residence Nil-Rate Band is an additional allowance available when a main residence is passed on to direct descendants, such as children or grandchildren. This allowance is also frozen at £175,000 per person for 2024/25. Like the standard Nil-Rate Band, it is transferable between spouses or civil partners.
How the Allowances Combine to £1 Million
For a married couple or civil partnership, the maximum potential tax-free threshold is calculated by combining both sets of transferable allowances. This creates the £1 million figure that has been highlighted.
The calculation works as follows for a couple where the second partner dies:
- Their own Nil-Rate Band: £325,000
- Transferable Nil-Rate Band from first death: £325,000
- Their own Residence Nil-Rate Band: £175,000
- Transferable Residence Nil-Rate Band from first death: £175,000
- Total Potential Threshold: £1,000,000
It is crucial to understand that this £1 million threshold is the maximum potential allowance. The actual tax-free amount available depends entirely on individual circumstances, including the value of the estate, property ownership, and who the beneficiaries are.
Who Is Affected and When Does It Apply?
This rule clarification is relevant for UK residents planning their estates, particularly homeowners with direct descendants. The allowances apply on death and are governed by the Inheritance Tax legislation administered by HMRC.
The Residence Nil-Rate Band is subject to a taper for estates valued at over £2 million. For every £2 over the £2 million threshold, the allowance is reduced by £1, meaning it is completely lost for estates valued at £2.35 million or more (when considering the tapered withdrawal). This is a critical detail for individuals with higher-value estates.
Why This Clarification Matters Now
With the Nil-Rate Band and Residence Nil-Rate Band frozen until at least April 2028, and house prices having risen significantly in recent years, more estates are being drawn into the Inheritance Tax net through a process known as “fiscal drag.” Understanding how to utilise these transferable allowances fully is therefore increasingly important for effective estate planning.
This explanation is based on current HMRC rules and thresholds. Tax planning is complex, and individuals should seek professional advice tailored to their specific situation. The rules explained here are confirmed legislation, not proposals or consultations.
